Machine for repairing scored engine cylinders



Aug. 18, 1925.

c. HOPPER I MACHINE FOR REPAIRING SCORED ENGINE CYLINDERS Filed March12. 1921 5 Sheets-Sheet be; h mm awnK INVENTOR Aug. 18,- 1925.

C. HOPPER MACHINE FOR REPAIR ING SCORED ENGINE CYLINDERS 5 She'ets4Sheet2 Filed March 12, 1921 zaww Aug. 18, 1925. 1,550,257

C. HOPPER MACHINB FOR REPAIRING SCORED ENGINE CYLINDERS Filed March 12,1921 5 Sheets-Sheet INVENTOR MACHINE FOR REPAIRING SGORED ENGINECYLINDERS Filed March 12, 1921 5 Sheets-Sheet 4 INVENTOR Aug. 18, 1925.1,550,257

I C. HOPPER MACHINE FOR REPAIRING SCORED ENGINE CYLINDERS Filed March12, 1921 5 Sheets-Sheet 5 INVENTOR Patented Aug. 18, 1925.

issazri CHARLES HOPPER, DE LOS ANGELES, CALIFORNIA.

MACHINE FOR REPAIRING SCCRED ENGINE CYLINDERS.

Kpplication filed March, 12, 1 92].. Serial No. 451,758.

To all whom it may concern:

Be it known that 1, CHARLES Horrnn, a citizen of the United. States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in a Machine forRepairing Scored Engine Cylinders, of which the following is aspecification.

It is the object of this invention to provide a combined milling,planing and grinding machine for operating on the interior ofcylindrical or tubular bodies and more particularly for forming channelson the inner walls of engine cylinders and the like, and for grindingand finishing inlays placed in the channels.

Another object of this invention is to provide a machine forfacilitating the repair of scored cylinders of internal combustionengines, by means of which the scores may be cut out and dove-tailedchannels formed for the reception of a metallic inlay and whereby thechannels may be readily formed with i oppositely inclined countersunkgrooves.

Another object is to provide a construction in a machine of the abovecharacter whereby either a milling, planing or grinding action may beperformed on the interior of a cylinder as occasion may require,embodying means whereby the milling and grinding action may be effectedby mechanical power and the planing by a manual power.

Another object is to provide means for supporting and centering anengine cylinder relative to the mechanism for operating thereon, and toprovide various adjustments whereby the machine is adapted to operate oncylinders of various diameters and at various points within thecylinders.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawings in which:

Figure 1 is a perspective view of the machine. I

Figure 2 is a detail in section and side elevation with portions brokenaway showing the application of the invention.

Figure 3 is a fragmentary view in end elevation, as seen on the line3-'3 of Figure 2 and illustrating the engine supporting head.

Figure 4 is a detail horizontal section as seen on the line d d ofFigure 2.

Figure 5 is a view in vertical section and elevation as seen on the line5-5 of Figure 2.

Figure 6 is a view in vertical section and elevation as seen on line 6-6of Figure 5.

Figure 7 is a detail in plan as seen on the line 77 of Figure 6.

figure 8 is a detall in vertlcal sectlon showing the detachable grindinghead.

Figure 9 is a detail in section and perspective illustrating the mannerof centering the engine cylinder by means of a chuclr.

Figures 10, 11 and 12 are details in perspective showing the manner ofplaning, milling and grinding the cylinder.

Figures 13 and 14 are details in section illustrating the manner offorming the channel.

Figure 15 is a sectional view showing the completed inlay.

In general the machine embodies means for adjustably supporting anengine cylinder or the like, a tool operating mechanism adapted toeffect either ainilling, planing or grinding action on the interior ofthe cylinder and mounted 'for vertical, longitudinal, lateral, andradial adjustment relative to the cylinder to dispose atool in anydesired position within the cylinder, and which tool operating mechanismis so designed that a tool may be rotated either axially, diametrically,or obliquely relative to the cylinder, and advanced lengthwise,circumferentially, or radially thereof.

More specifically indicates a base plate on which is mounted a standard11 here shown as comprising a vertically disposed plate having acircular opening 12 adjacent to its upper end through which access maybe had to the interior of an 'engiiie cylinder supported on the standardas will be presently described.

Mounted 011 the back of the standard is a turnable work-holding plate 13having an opening formed with a marginal flange 14 adapted to extendinto the opening 12. An annular rib on the plate extends into a channelon the back of the standard to increase the bearing of the plate.

For securing the work-holding plate against the standard in variouspositions, a series of bolts 16 are provided and arranged with theirheads positioned to engage the shoulders of an annular T-channel 17formed on the back of the plate as shown in Figure 2; the bolts beingeach provided with a nut 18 which when screwed on the bolts serve toclamp the plate on the standard. An opening 19 is formed in the platewhich, when disposed opposite a bolt receiving opening in the standard,will permit insertion of the bolt.

As a means for securing an engine cylinder on the plate the outer faceof the latter is formed with a series of parallel openended T-channels20 at apted to receive the heads of bolts 21 extending through clamps 22arranged to engage the flanges of an engine cylinder as indicated indotted lines in Figure 2.

By providing the plate with a series of the channels 20 it is adapted toreceive engine cylinders of various sizes which are designed to besupported on the plate with the open end of the cylinder disposedconcentrically with the opening in the standard; the engine cylinderbeing centered by means of a chuck as will be later described.

After the engine cylinder has been secured to the plate the latter maybe turned by loos ening the nuts 18 to dispose any desired portion ofthe engine cylinder lowermost.

Mounted on the front face of the standard 11 to have both swingingmovement and vertical adjustment thereon is a bracket 28 which forms asupport for the operating mechanism of the machine and embodies a leaf24 secured to the standard by hinges 25 to afford swinging movement andwhich leaf carries a pair of guide channels 26 in which a slide member27 is mounted for vertical adjustment.

The slide member carries a bed 28 arranged to project horizontally fromthe standard when the leaf 24 is closed thereagainst. A clamp latch 29mounted on the standard is provided to engage the leaf 24 to hold thelatter in its closed position.

Mounted on the bed is a longitudinally er:- tending shaft 30 the outerend of which projects beyond the end of the bed and is adapt ed toreceive a removable hand crank (not shown) by which the shaft may berotated. lhe inner end of the shaft is fitted with a beveled gear 31which meshes with a gear 32 on a vertical shaft extending downwardlythrough a bearing on the slide member 27 and which shaft is formed witha worm 34 and is threaded through a block 35 fixed to the leaf 24: theworm 34 serving as a means to raise and lower the bed on rotation of theshaft 30.

A carriage 37 is slidably mounted on guide flanges 36 on the bed and isadapted to be advanced or retracted relative to the standard, and forthis purpose a worm shaft 38 is mounted on and extends lengthwise of andparallel to the shaft 30; the outer end of the worm shaft extendingbeyond the end of the bed and adapted to be rotated by a hand crank. Aninternally threaded divided sleeve 39 mounted on the carriage engagesthe worm shaft 38 and is adapted to be moved in or out of engagementtherewith; the members of the sleeve 39 being formed with upwardlyprojecting lugs 40 which engage slots 41 on a pivoted disk 42 mounted onthe upper face of the carriage and provided with a handle 43 by whichthe disk may be turned to cause the divided members of the sleeve tomove toward or away from each other and in and out of engagement withthe worm shaft. When the sleeve is in engagement with the shaft,rotation of the latter will cause the carriage to move toward or awayfrom the standard at comparatively slow speed.

li Ieans are provided for manually advancing and retracting the carriageat a speed greater than could easily be effected by the worm shaft whichis here shown as comprisa lever 44 pivoted at 45 on the bed and ing itsshort arm connected to the short arm o a bell-crank lever 44 the longarm of which connects with the carriage by a link 46, By moving thethreaded split sleeve eat of engagement with the threaded shaft andoperating the lever 44 the carriage may be freely moved back and forth.

. ounted on the carriage 37 for lateral adius-z'ment thereon is a slideblock 47 having a dove-tail channel slidably engaged by a dove-tailflange 48 on the carriage. The dove-tail flange is formed with alongitudinal channel 49 into which a threaded sleeve 50 on the block 47projects; the threaded sleeve being engaged by a threaded shaft 51mounted on the carriage and extending lengthwise of the channel 49., theouter end of the shaft 51 projects from the side of the carriage and isadapted to be engaged by a hand cranl'r whereby it may be rotated toadvance or retract the block 47 laterally of the bed. A set screw 52 isprovided in the block and adapted to engage a shim to securely hold theblock against movement or vibration on the carriage.

Formed on the slide block 47 is an open ended cylinder 53 extending inthe direction of the length of the bed and which cyl nder forms abearing for a rotary hollow head 54 One end of the head is formed withan end wall 55 and has a flange 56 arranged to abut against the innerend of the cylinder, whilst the opposite end of the head is fitted witha demountable end-plate 57 arranged to abut against the opposite end ofthe cylinder. The edge of the end-plate 57 is formed with worm-teeth 58which are engaged by a worm-pinion 59 mounted on a shaft 60 extendingtransversely of the bed and sup ported in bearings carried by the block47. One end of the shaft 60 projects to one side of the block and isadapted to receive a hand crank by which it may be rotated manually toslowly turn the head and the opposite end of the shaft 60 is connectedby a disengageable sleeve 60 to an electric motor 6] carried on theblock 47 and which motor is provided for therpurpose of rotating thehead at comparatively high speed. The ends 55 and 57 of the head areformed with vertically extending slots 62 and 63, and 8X- tendingthrough the head and through the slots is a tubular tool carrying shank64 which is designed to rotatewith the head and to be adjustablediametrically of the latter to vary its position relative to the axis ofthe head. For the purpose of adjusting the tubular shank in the head, apair of threaded stud shafts 65 are screwed into bosses on the shank andare affixed to wormwheels 67 carried onthe interior of the head, andwhich worm-wheels mesh with wormpinions 68 on an adjustment shaft 69carried by the head. The outer end of the shaft 69 projects forward ofthe end-plate 57 and is adapted to be rotated by a hand crank to effectmovement of the shank radially of the head.

Extending lengthwise of the shank interiorly thereof and supported inball-bearings therein, is a spindle 70, one end of which is connectedthrough a flexible shaft 71 to a motor 72 by which the spindle may berotated. The opposite end of the spindle is fitted with a pinion 78which meshes with a pinion 74 fitted with a hub 75 mounted in a threadedplug 76 screwed in the under side of the shank. The pinion 7a is formedwith a tubular end-thrust extension 77 adapted to bear against athreaded plug 78 screwed into the side of the shank opposite the plug 76.

Mounted within the pinion 74 is a tube 79, the lower end of which isformed with a split cone 80 opening in a tapered bore in the hub andadapted to grip the stem of a milling tool; the upper end of the tubebeing engaged by a threaded connection to a screw 81 extending throughthe plug 78 and adapted to be turned t advance or retract the tube 79 tocause the tube to be engaged with or disengaged from the milling tool.The outer end of the tubular shaft is fitted with a threaded plug 82adapted to form a support for a shaper tool and which plug may heremoved and replaced by a plug 83, particularly shown in Figure 8., andwhich plug constitutes a bearing for a shaft 84: carrying a grindingwheel 85 and fitted with a beveled pinion 86 adapted to mesh with thepinion 7 when the plug 83 is screwed into the end of the tubular shaft.

As a means for determining the normal central positions of the severaladjustable parts and by means of which these parts may be reset tovarious known previous positions, a series of indicating devices areemployed. For this purpose the outer face of the guide channel 26 isprovided with graduations 87 and the bed is provided with a pointer 88;the pointerindicating a Zero graduation when the bed is so disposed thatthe tubular shaft will be positioned axially of the drum and of theopening 12 in the center. A guide flange 89 on the drum end plate isprovided with graduations 90 and a pointer 91 is carried by the tubularshaft and registers with a zero gradnation when the tubular shaft isdisposed axially of the drum. A pointer 92 on the block d7 co-operateswith graduations on the carriage 87 to indicate the relative positionsof the block and carriage and to denote when the tubular shaft ispositioned on the vertical center of the opening 12. A pointer 98 on thecylinder 58 registers with graduations 94: on the flange 56 to designatethe relative positions of the drum and its casing.

In the operation of the. invention, the engine cylinder isclamped to theface plate, as before described, and arranged with its aXis extending inalignment with the center of the opening 12; the cylinder being centeredby means of a chuck 95, as shown in Figure 9. This chuck is fitted withexpansion jaws 96 engageable with the margin of the cylinder opening andby which it may be engaged with cylinders of various diameters, and hasa cylindrical body 97 which slidably fits the flanged opening in thework supporting plate. The chuck is employed in placing the cylinder inposition, after which it is removed. When the cylinder is secured to theplate, the latter is then turned to position the scored portion of theengine cylinder lowermost whereupon the face plate rigidly clampedagainst the standard by the bolts 16 and nuts 18, as before described. 7

shown in Figure 10. The carriage 87 is then disengaged from the shaftand the lever L4. operated to advance the carriage 87. The cutting toolis then lowered into contact with the engine cylinder by rotating theshaft 69, whereupon the cutting action may be effected by longitudinalmovement of the carriage by manually operating the lever 44, or thecarriage may be advanced slowly by re-engaging the sleeve 39 with theshaft 38 and rotating the latter. if desired, the carriage may beadvanced by the screw shaft 38 and retracted more speedily by operationof the hand lever,

lVhen it is desired to mill a dove-tail channel in the cylinder, theplaner tool is removed and a straight milling tool afiixed to the stockin the pinion and driven from the motor 72.

In the milling operation the tool may be advanced longitudinally of thecylinder, either by rotation of the threaded shaft 38 or the hand lever34. Lateral movement of the milling tool is effected by manuallyrotating the drum by turning the shaft 60 previously disconnected fromthe motor 61. n In milling the channel, the milling tool is advancedlongitudinally of the cylinder in a vertical position and in alignmentwith the vertical center of the cylinder, as indicated in Figure 13. soas to form the channel with vertical side walls; a side cutting millingtool being employed. The initial cut will thus be formed to extend alongthe vertical center of the cylinder. On completing the length of thecut, the milling tool is advanced to either side of the channelpreviously formed where it is desired to form the channel of a widthgreater than the diameter of the milling tool. This lateral movement ofthe milling tool is effected by shifting the block 47 and the headthereon, during which movement the milling tool will remain in avertical position. The milling tool is then again advanced lengthwise ofthe cylinder to widen the channel.

On completing the initial cut of the hannel whereby it is formed withside walls paralleling a radius of the cylinder. the milling tool isdisposed at an angle and lowered to increase the depth of its cut. so toform the channel with an inclined side wall terminating in a groove atthe juncture of a bottom and side wall of the channel, as shown inFigure 14:. The positioning of the milling tool at an inclination iseffected by turning the head through the medium of the shaft 60. andlowering of the milling tool is effected by operating the adjustmentshaft 69. he milling tool is obviously inclined in one direction whenundercutting one side wall of the channel, and is inclined in theopposite direction when undercutting the other side thereof.

The completed channel will thus be formed with oppositely inclined sidewalls which are preferably formed at an inclination of about 10 degreesfrom the vertical, and the channel will have spaced grooves in itsbottom wall whereby an inlay 99,

placed in the channel as shown in Figure 15, will be formed of increasedthickness along its edges, thus reinforcing the inlay and securelyanchoring it against displacement.

In forming the channel in the manner before described, the use of anundercutting milling tool is obviated as the channel may be formed by astraight side cutting tool.

Before placing the inlay in the channel, the bed is swung to one side togive access to the interior of the cylinder, the hinged mounting of theleaf 24 permitting ready movement of the mechanism to one side. Theinlay may be put in place in any desired manner. whereupon the head isswung back, into position, and a grinding tool, such shown in Figure 8,is then attached to the end of the shaft 54, with the pinions 86 and'74: intermeshing. The head is then positioned in axial alignment withthe engine cylinder. and the shank is adjusted on the head to disposethe grinding wheel in position to grind the inlay flush with the innersurface of the engine cylinder. The head may then be oscillated by meansof the shart 60 to grind the inlay flush with the cylinder. hen it isdesired to grind the interior of the cylinder throughout, the ssh 60 maybe connected to the motor 61 and the head rotated so that the grindingwheel will traverse the inner wall of the engine cylindercircumferentially thereof; the grinding wheel being rotated on thetubular stem. by the motor 72 during this operation, and the grindingwheel advanced lengthwise of the cylinder at the same time by advancingthe carriage, as before described.

By mounting the cylinder on the turnable plate opposite to andconcentric with the openings in the plate and standard, the cylinder maybe turned to dispose a score therein in any desired position relative tothe tool, and by providing the various gage marks the position of thetool relative to the center of the cylinder may be readily adjusted, asoccasion may require; each of the gage marks being provided with a zeromark, to which a pointer would indicate when the adjustable part wouldbe in such position as to dispose the center of the head and shank inalignment with the center of the cylinder when the several adjustableparts are all in the Zero position.

This enables rapid adjustment of the parts to suit cylinders of variousdiameters.

In event it is desired to operate on the cylinders of an internalcombustion engine without removing the engine from its mounting, thesame may be effected by detaching the bed from the standard, andsupporting it in any desired manner to position the tubular shaftvertically and in operative relation to the cylinder.

Whilst the invention has been specifically described, it is manifestthat various changes may be made in the details of construction and thearrangement of parts without departing from the spirit and scope of theinvention as set forth in the appended claims, and I, therefore, do notlimit myself to the precise construction shown.

l/Vhat 1 do claim as my invention, and desire to secure by LettersPatent, is

1. In a machine of the character described, a rotary head, a shankprojecting through said head and adapted to extend axially thereof,means for adjusting said shaft laterally in said head parallel to theaxis thereof, screw means for adjusting said head vertically, screwmeans for adjusting said head laterally, and means for reciprocatingsaid head longitudinally.

2.111 a machine of the character described, means for adjustablysupporting a cylinder, a vertically adjust-able bed-frame, a carriageslidable longitudinally of said bed-frame, a rotary head on saidcarriage adjustable transversely thereof, a tool-supporting shankextending longitudinally through said head and adjustable diametricallytherein parallel to the axis thereof.

3. In a machine of the character described, means for adjustablysupporting a cylinder, a hinged and vertically adjustable bed-frame, acarriage slidable thereon, a block slidable transversely of thecarriage, a rotary head on said block, a shank extending longitudinallyof said head and adapted to extend axially thereof, and the means onsaid head for adjusting said shank diametrically of said head andmaintaining it parallel with the axis of the latter.

t. In a machine of the character described, a bed-frame, a carriageslidable thereon, a screw means for advancing said carriage, means fordisengaging said screw means, a lever operated means for advancing saidcarriage on release of said screw means and tool supporting andoperating mechanism supported on said carriage.

In a machine of the character de scribed, a standard, a work supportingplate on said standard having an opening therein, means for supportingan engine cylinder on said plate with its open end disposed concentricwith the opening in the plates, means whereby said plate may be rotatedaround an axis extending centrally through said opening, and means forclamping said plate to said standard.

6. In a machine of the character described, a standard, a worksupporting plate thereon having an opening therein, means for attachingan engine cylinder on said plate with its open end extending axially ofsaid opening, a bed-frame adjustable vertically on said standard beneathsaid opening, a rotary head mounted for lateral and longitudinalmovement on said bed-frame, and a t0ol-supporting shank extendinglongitudinally through said head parallel with said bed-frame adapted tobe adjusted diametrically of said rotary head.

7. In a machine of the character described, a bed-frame, a carriageslidab-le longitudinally thereof, a rotary head on said carriageadjustable transversely thereof, a tool-supporting shank extendinglongitudinally of said head, and slidable diametrically thereof, meansfor adjusting said shank to dispose it at various positionsdiametrically to the head and parallel to the axis thereof, a spindlecarried by said shank, and means for rotating said spindle.

CHARLES HOPPER.

